Causes of low frequency deafness

Stenosis of eustachian tube:

Many patients with low-frequency hearing loss show ear depression and low-key tinnitus, and they complain of light pleasure after ventilation; hearing test often measures conductive deafness hearing curve, and the result of acoustic immittance is middle ear negative pressure curve.

This is often the manifestation of narrow eustachian tube. The causes of eustachian tube stenosis can be traumatic or nasopharynx inflammation.

Meniere’s disease:

This is a kind of inner ear disease mainly manifested as paroxysmal vertigo and fluctuating sensorineural deafness caused by labyrinthine edema of inner ear. Early deafness is generally low-frequency deafness, with volatility, and later hearing is fixed, still mainly low-frequency deafness. In general, the pathogenesis of single ear is unknown, which may be related to congenital inner ear abnormality, autonomic nerve dysfunction, virus infection, autoimmunity, etc.

Auditory neuropathy:

The hearing was mild to moderate sensorineural deafness. The main type is low frequency loss. The etiology of the disease is not clear, because auditory neuropathy is more common in infants and adolescents, so it is considered that the possible etiology is related to genetic diseases, immune diseases, infectious diseases such as measles, meningitis and toxic substances metabolic diseases such as neonatal hyperbilirubinemia.

Secretory otitis media:

Hearing examination generally shows mild or moderate conductive deafness or mixed deafness, mainly low-frequency deafness. The main pathological feature was middle ear effusion, and most of them had a history of upper respiratory tract infection before the onset of the disease. Most of the clinical symptoms are hearing loss and stuffy feeling of ears, and tinnitus is not serious. Traumatic perforation of tympanic membrane: the perforation of tympanic membrane is caused by external violence and loud sound acting on the ear or by direct puncture of foreign bodies. In addition to earache, the patient also shows ear tightness and hearing loss. Hearing examination showed that it was conductive deafness, mainly low-frequency deafness.

To prevent the occurrence of low-frequency deafness, first of all, we should prevent the inflammatory effect of various viruses, bacteria and other pathogenic bacteria on the ear, such as medication as soon as possible after a cold, so as to avoid the inflammation reaching the middle ear through the eustachian tube, especially pregnant women, infants and children to avoid virus, parasites and other infections.

If people with autoimmune diseases or familial genetic diseases have low frequency hearing loss, they should be alert to the occurrence of immune diseases such as Meniere’s disease or auditory neuropathy. At the same time, we should pay attention to protecting ears and hearing to prevent injury such as trauma and noise.